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Introduction to Linux - A Hands on Guide

This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter.
For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration. This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant. They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own.

Hi All,
I have a doubt regarding handling of interrupts in thread context.

Say, an interrupt has occurred in a kernel thread context and the interrupt handler got executed.

Will the control of execution return back to the kernel thread soon after the execution of the interrupt handler?
Or
The interrupt handler gets executed, and if any soft irqs are pending, they are executed followed by returning the control back to the thread.

The pending interrupts have to have a higher IRQ level than that of the kernel thread to get executed before the executions is returned to the kernel thread. But honestly, I doubt they can...
If there are interrupts with higher IRQ level that this example kernel thread they anyway get executed before it.